Engaging in conversation with an idiot. Is it worth it?

A painful conversation between Prof. Gary Francione and an apparent idiot named Matt Wheatley:

(And then an extra comment from a mysterious man named Juho James Suomalainen. I wonder who this sexy character is?)

Why do idiots speak? Why don't they shut up and/or disappear?

Wouldn't it be great if all the intellectually dishonest simpletons suddenly let go of all their excuses and started to use their brain powers for good?